centos man page for atomic_dec_and_mutex_lock

ATOMIC_DEC_AND_MUTEX(9) 					Mutex API reference					   ATOMIC_DEC_AND_MUTEX(9)

NAME
       atomic_dec_and_mutex_lock - return holding mutex if we dec to 0

SYNOPSIS
       int atomic_dec_and_mutex_lock(atomic_t * cnt, struct mutex * lock);

ARGUMENTS
       cnt
	   the atomic which we are to dec

       lock
	   the mutex to return holding if we dec to 0

DESCRIPTION
       return true and hold lock if we dec to 0, return false otherwise

AUTHOR
       Rusty Russell <rusty@rustcorp.com.au>
	   Author.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   ATOMIC_DEC_AND_MUTEX(9)